Maker Parts LIst Updates

## Background:

Investigate alternatives to how I store the maker parts data.
Currently, maker_parts/management/commands/seed_parts.py
only handles DigiKey parts provided by maker_parts/data/seed_parts.json

seed_parts.json contains a list of common DIY maker parts but is very limiting and worst of all only contains Digikey part numbers.

```bash
[
"2648-SC0915TR-ND",
"2648-SC0917-ND",
"2648-SC1634-ND",
"1597-102010428-ND",
"1597-113991114-ND"
]
```
## Acceptance criteria:
- Create a better parts list update experience
- Add flexibility for other vendor apis

Start by reading maker_parts/management/commands/seed_parts.py and maker_parts/data/seed_parts.json to understand the current DigiKey-only workflow. Compare the stated acceptance criteria against the existing command and data format, then define a parts update approach that supports additional vendor APIs and provides a better update experience.

Written by the indexing model from the issue text.